Automatic stopping means



Oct. 30, 1928.

S. HALVORSEN AUTOMATIC STOPPING MEANS Original 'Filed May 20. 1922Patented Oct. Y 30, 1928.

UNITED STATES PATENT oF mcE.

SEVERIN HALVORSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE NEWSPAIPEItSTUFF- ING- MACHINE COMPANY, OF SEATTLE,

IN'GTON.

WASHINGTON, A CORPORATION OF WASH- AUTOMATIC STOPPING MEANS.

Original application filed May 20, 1922, Serial No. 562,462. 'Dividedand this application filed June 5,

- 1924. Serial No. 718,169. I

My invention relates to means for autw nlatically stopping machinery,particularly in case of trouble or defective action in the operation ofthe machinery.

The principal object of the invention is to provide simple, practicaland advantageous automatic stopping means.

Another object of the invention is toprovide a construction by whichcertainand renewspapers, but it will be readily seen and understood thatthe invention is capable of various other applications and uses.

In the drawlngs Fig. 1 is an end view partly in cross section of thenewspaper stuffing machine provided with an automatic stopping mechanismembodying my present invention; a

Fig. 2 is a side elevation of the automatic stopping mechanism;

Fig. 3 is a, longitudinal section of a portion of such mechanism; and

Fig. 4 is a cross section taken on line 44: in Fig.2.

Referring to the drawings, I show a newspaper stufling machine which isnot claimed of itself herein, and which accordingly will not bedescribed atlength. In general it may be said tobe provided with atrough 1 into which newspaper and cover sections 2 are fed, and thenmoved along the trough 1. As moved along, insert sections 3, 4 and 5 arefed into the cover sections 1 and then the completed or stuffed paper isdischarged.

In Fig. 1 I show chains 66 for moving the paper sections along thetrough 1, and

these are driven by .other. chains 77 by means of a drive shaft 8connected by pinions 9 and 10 with a vertically arranged shaft 11 whichis'in turn connected by pinions 12 and '13 with another and for presentpurposes a main drive shaft 14.

In newspaper stuifing machines such as above set forth, it is possiblethat at timesthere may be defective feeding of the paper sections orclogging in some way of the sections in the trough 1, and this mayresult in forcing such a jam in the trough that a. heavy strain will bebrought on the machinery and some breakage might result in case thatstrain was not relieved. Such a dangerous strain might result in themachine from other causes. n

In accordance with my invention I provide means by which the machinewill be automatically stopped in case a dangerous strain develops inthemachine, ,either from clogglng of paper sections in the trough, orotherwise. I To such end I make the drive shaft 1 1 jointed, having twoparts 14. and 14 (Fig. 2) and connect thesetwo partstogether sothatnormally they will automatically drive as a single shaft, but in case adangerous'strain takes place, one part will be stopped by the strainbefore the same reaches the danger point and the entire machinethereupon be stopped, thereby avoiding-injury'or damage "to the machineand allowingopportunity for' removal of the trouble.

y In the arrangement herein shown, which is one of a number of desirablearrangements which could be employed, I connect the shaft sect-ions 14and 1 1 together by means of a pin 15 which is of suflicient strength tocause the part 14* which is connected with the motor or prime mover ormain driving shaft, to turn the part 14? during all normal conditions,but said pin 15' is sufficiently weak to result in its being broken incase an undue strain occurs to mechanism attached to the shaft sectionlt, as for example a jam in the trough l'resulting in the bringing of aheavy strain upon the mechanism moving the paper sections in the trough,and thereby imposing such heavy strain upon the shafts 8 and 11.

I further provide an electricalconnection arrangement by'which anelectrical circuit may be closed when pin 15 is broken and shaft section14 is stopped and section 1 1 is therefore allowed to move by itself,which electrical connection automatically stops the prime mover ordisconnects or stops the main driving shaft, thereby stopping the entiremachine. v

The electrical connectionshown comprises a pin 17 mounted in a slot 18in a collar or head 19 on shaft 'section 14", said pin 17 being subjectto a spring 20 tending to force it out of said slot 18. Pinion 13 isprovided with an insulating strip or segment 22, against which pin 17normally is pressed, said pin 17 contacting with the metal of pinion 13,however, when pin 15 is broken and shaft sect-ion 14 with collar 19moves or rotates relatively to shaft section 14 and pinion 13. A metalcollar 23 with radial flange 24 is provided and fitted on an in sulatingsleeve 25 having an annular projecting portion 26, on which metal collar23 fits, and an insulating disk' 27 is fitted on the other side of metalflange 20, thereby insulating said collar 23 and flange 24. The members19 and 25 are fast on shaft section 14, so that said section 14 willturn section 14 through pin 15. Member 19 has an insulating sleeve 28 inwhich pin 17 fits and moves. Spring 20 makes contact with flange 24through aperture in disk 27, thereby establishing electricalcommunication between pin 17 and collar 23 but said pin is otherwiseinsulated by reason of insulation 26, 27 and 28. A brush 3O fits oncollar 23 which thereby acts as a commutator and an electrical conductor31 is connected by binding Ipost 32 with brush and supported by racket33 so that electrical connection may be made between conductor 31 andpin 17, as a result of which when pin 14 breaks pin 17 will complete anelectrical circuit from 31 to pinion 13 and shaft section 1 1 and this Ielectrical circuit may contain any suitable stopping mechanism, as forexample, a switch which may be arrangel so that when its circuit isclosed it will open a motor circuit, the motor forming the prime moverfor the machine, or the circuit when closed may operate a magneticdevice capable of shifting a belt or otherwise throwing power ofl fromthe machine in case it is directdriven by some power mechanism orshafting.

Thus it will be seen that the invention permits the automatic stoppingof the machine in case a dangerous strain is placed ,upon it, and thatthis is accomplished in a simple and expeditious manner.

It will be understood that changes and modification may be made withoutdeparting from the spirit of the invention.

What I claim is: i

1. In a machine of the character described, the combination of shaftsections, means providing a connection between said sections, one ofsaid sections having an insulating block, the other having a movablecontact making element which is held out of electrical connection by,means of said block, said movable contact making element being movablerelatively to said block to thereby complete an electrical connectionupon the separation of the connection.

2. The combination of separate shaft sections, one of which is providedwith a metallic member having an insulating block and the other of whichis provided with an insulating sleeve carrying a commutator ring and ametallic member mounted on said insulating sleeve and containing aninsulating sleeve having a pin adapted normally to contact with saidinsulating block, a spring tending to push said "pin outwardly, a pinbetween the metallic members on said shaft sections and a brush on themetallic member on the second mentioned shaft section,

In witness whereof, I hereunto subscribe my name this 28th day of May,A. D., 1924.

SEVERIN HALVORSEN.

